EP4363766A1 - Vertical automotive lighting module with identical day and night lighting aspects - Google Patents

Abstract

The invention relates to a lighting module (12) for a motor vehicle, comprising a plurality of lighting sub-modules (14, 16) each comprising: at least one light source; a flat optical light guide with an input surface, an output surface and a reflection surface which is capable of reflecting light from the input surface to the output surface; wherein the plurality of lighting sub-modules (14, 16) comprises first lighting sub-modules (14) configured to each produce a lighting sub-beam with an upper horizontal cut-off, and second lighting sub-modules (16) configured to each produce a lighting sub-beam without an upper horizontal cut-off; and the first and second lighting sub-modules (14, 16) are juxtaposed so as to form, along the juxtaposition, a plurality of alternations between the first and second lighting sub-modules (14, 16).

Description

VERTICAL AUTOMOTIVE LIGHTING MODULE WITH IDENTICAL DAY AND NIGHT ILLUMINATED ASPECTS

The invention relates to the field of lighting, in particular automotive lighting.

Motor vehicle headlamps currently provide, among other things, three regulatory lighting functions, namely an upper horizontal cut-off lighting function, commonly referred to as "low-beam" (or "low-beam"), a uninterruptible lighting, commonly referred to as "road" or "high-beam" (or "high-beam"), as well as a daytime running light function commonly referred to as "DRL", an acronym for the English expression "Daytime Running" Light".

The published patent document EP 2 045 515 A1 discloses a lighting module, in particular with an upper horizontal cut-off, that is to say of the "code" type, comprising an optical guide in a vertical sheet with one end, on the side of the exit face, of diverging section and forming with the curved exit face a projection lens. The sheet optical guide comprises a reflection face with a curved profile, of the parabolic type, configured to reflect the rays coming from the input face towards the output face along an optical axis of the lighting module. To this end, the light source or sources opposite the entrance face are located at the focal point of the parabolic profile. This document also provides for arranging several optical guides in a side-by-side sheet, these sheets joining towards the rear at the level of the reflection face and the input face.

The published patent document EP 2 679 884 A1 discloses a lighting module, in particular with an upper horizontal cut-off, that is to say of the "code" type, comprising a flat horizontal optical guide with a series of projection lenses on the output face and a reflection face with a stepped profile to distribute the transmitted light along the guide to the various projection lenses.

The lighting modules described above are interesting in that they make it possible to perform regulatory automotive lighting functions while having an illuminated face, namely the output face of the optical guide, thin and elongated, providing an advantage integration into a vehicle body. However, they have the disadvantage of providing only one lighting function. To ensure the regulatory lighting functions, i.e. with and without horizontal cut-off, it is necessary to provide two lighting modules, possibly arranged side by side. The combined exit face then presents distinct lit aspects depending on the activated lighting function. However, it is desirable for the output or illuminated face to have an identical or at least similar appearance in the different lighting functions.

The object of the invention is to overcome at least one of the drawbacks of the aforementioned state of the art. More particularly, the object of the invention is to propose an automobile lighting module providing at least two lighting functions, preferably a lighting function with cut-off and a lighting function without cut-off, while presenting an essentially lit appearance constant. Even more particularly, the invention aims to provide an automotive lighting module having a vertically elongated shape.

The subject of the invention is a lighting module for a motor vehicle, comprising a plurality of lighting sub-modules each comprising at least one light source; a flat optical guide with an input face facing the at least one light source, an output face and, at the rear of the output face, a reflection face capable of reflecting light light from entrance face to exit face; notable in that the plurality of lighting sub-modules includes first lighting sub-modules configured to each produce a lighting sub-beam with an upper horizontal cut-off and second lighting sub-modules configured to produce, each, a sub-beam of illumination without an upper horizontal cutoff; and the first and second lighting sub-modules are juxtaposed so as to form, along the juxtaposition, several alternations between the first and second lighting sub-modules.

By juxtaposition, we mean that the lighting sub-modules are arranged side by side with or without play.

By flat optical guide is meant an optical guide with two main opposite and generally parallel guide faces, these two faces being generally extended without necessarily being perfectly flat. These two faces are separated by a perimeter defining a thickness of the flat optical guide, the thickness also being able to be variable. The entrance face, the reflection face and possibly the exit face are located on this perimeter.

According to an advantageous embodiment of the invention, the flat optical guides of the plurality of lighting sub-modules extend along a main horizontal or vertical direction, when the lighting module is in the mounting position and observed from the front.

According to an advantageous mode of the invention, the output faces of the flat optical guides of the plurality of lighting sub-modules are adjacent and form an overall output face of the lighting module having a height H and a width l, said height H being greater than or equal to 5 times said width l. The adjacent output faces can be in direct contact or have a game, step by step.

According to an advantageous embodiment of the invention, the output faces of the flat optical guides of the plurality of lighting sub-modules each have a width less than or equal to 5 mm.

According to an advantageous mode of the invention, the several alternations between the first and second lighting sub-modules are at a number corresponding to the number of the first lighting sub-modules or to the number of the second lighting sub-modules.

According to an advantageous embodiment of the invention, the flat optical guides of the plurality of lighting sub-modules form sheets extending in a main vertical direction, when the lighting module is in the mounting position and observed from the front , and are offset longitudinally relative to each other so that the output faces of said flat optical guides have an inclined and/or curved horizontal profile.

Advantageously, for at least one, preferably each, of the first and/or second lighting sub-modules, the flat optical guide forming a layer extending vertically is a first flat optical guide and the at least light source is at least a first light source, said lighting sub-module comprising a second flat optical guide forming a sheet extending vertically, vertically opposite the first flat optical guide, and at least one second light source illuminating an input face of said second guide flat optics. The second flat optical guide comprises an output face aligned with the output face of the first flat optical guide and a reflection face capable of reflecting light from said input face towards said output face of said second flat optical guide. The at least one first and second light sources are advantageously arranged on opposite faces of a common plate.

According to an advantageous embodiment of the invention, the output face of each of the flat optical guides of the plurality of lighting sub-modules has a vertical profile in a staircase and inclined, from top to bottom, towards the rear.

According to an advantageous embodiment of the invention, for each of the flat optical guides of the plurality of lighting sub-modules, the input face is transverse to the output face and the reflection face has a curved vertical profile able to reflect the light from the input face to the output face along an optical axis of the corresponding lighting sub-module.

According to an advantageous embodiment of the invention, each of the flat optical guides of the plurality of lighting sub-modules comprises a connecting portion with two divergent lateral faces, connecting the sheet to the output face, said output face having a Curved transverse profile forming a lens.

According to an advantageous embodiment of the invention, the lighting module further comprises additional light sources arranged at the rear of the two divergent faces of the flat optical guides of the plurality of lighting sub-modules, configured to ensure a daytime running light function.

According to an advantageous embodiment of the invention, the flat optical guides of the plurality of lighting sub-modules extend along a main horizontal direction, when the lighting module is in the mounting position and observed from the front, and are longitudinally offset relative to each other so that the output faces of said flat optical guides have an inclined or curved vertical profile.

According to an advantageous embodiment of the invention, the output face of each of the flat optical guides of the plurality of lighting sub-modules has a stepped and inclined horizontal profile, from an interior side towards an exterior side of the vehicle, rearward.

According to an advantageous mode of the invention, for each of the flat optical guides of the plurality of lighting sub-modules, the reflection face comprises facets capable of reflecting the light from the input face towards lenses on the face output along an optical axis of the corresponding lighting sub-module.

According to an advantageous mode of the invention, for each of the flat optical guides of the plurality of lighting sub-modules, the reflection face has a profile such that a distance between the exit face and the reflection face, according to the optical axis of the corresponding lighting sub-module decreases as a distance between said reflection face and the input face increases.

According to an advantageous mode of the invention, the lighting module also comprises additional light sources arranged behind the reflection faces of the flat optical guides of the plurality of lighting sub-modules, configured to ensure a daytime running light function.

The subject of the invention may be a headlamp for a motor vehicle, comprising a housing forming a cavity, a glass for closing the cavity, on the housing, and a lighting module arranged in the cavity, said lighting module being according to the 'invention.

The measures of the invention are advantageous in that they make it possible to produce a lighting module ensuring at least two regulatory lighting functions while presenting lit aspects in the various functions which are very similar, or even identical. The lighting module can also be elongated vertically and have inclinations or curves in vertical and horizontal planes, which is advantageous for integration into the bodywork of a motor vehicle. A third lighting function, i.e. daytime running light, can also be easily integrated, while maintaining a lit appearance that is very similar or even identical to that of the other lighting functions.

is a perspective view of the front face of a vehicle equipped with a lighting device according to the invention;

is a front view of a lighting module according to a first embodiment of the invention;

is a perspective view of a lighting sub-module of the lighting module of the ;

is a horizontal sectional view of the front part of the lighting sub-module of the ;

is a profile view of the lighting module of the ;

is a view along section VI-VI of the lighting module of the ;

[Rectified per Rule 91, 30.09.2022]
is a side view of a variant of the lighting module of the ;

is a front view of a lighting module according to a second embodiment of the invention;

is a top view of a lighting sub-module of the lighting module of the .

detailed description

In the following description, the directions and direction expressed by terms such as "front", "rear", "longitudinal", "up", "down", "inside" and "outside" are to be understood when the modulus of lighting is in the normal mounting position on the motor vehicle.

The is a schematic illustration of the left front part of a motor vehicle equipped with a headlamp according to the invention.

The motor vehicle 2 comprises a front bumper 4, a left front fender 6 and a bonnet 8 between which is arranged a headlight 10. This is a left headlight, it being understood that the right headlight, also according to the invention, is symmetrical to the left projector 10 with respect to a vertical median longitudinal plane. The projector 10 extends along a main vertical direction. It thus has at its protective glass a height H and a width l , the height H being greater than or equal to five times the width l . It should also be noted that the protective glass of the projector 10 can be tilted rearwards along its height from the bottom upwards. Similarly, it can also be tilted rearward along the width from the inside of the vehicle to the outside of the vehicle. These inclinations can be formed by inclined or curved vertical and horizontal profiles. It is understood that these inclinations and curved profiles depend on the geometry of the motor vehicle and are essentially geometric constraints that the present invention makes it possible to integrate. It is thus understood that these inclinations and curved profiles are not in themselves essential characteristics.

Figures 2 to 7 illustrate a lighting module of the projector 8 of the , according to a first embodiment of the invention.

The is a front view of the lighting module 12 according to the first embodiment. It comprises a juxtaposition of lighting sub-modules 12 and 14 each consisting essentially of a vertical sheet optical guide and at least one associated light source. The lighting sub-modules comprise first lighting sub-modules 14 capable of each forming a lighting sub-beam with upper horizontal cut-off and second lighting sub-modules 16 capable of each forming a sub-beam of lighting without superior horizontal cut-off. The juxtaposition of the first and second lighting sub-modules 14 and 16 alternates so as to mix the first lighting sub-modules 14 with the second lighting sub-modules 16. At the , the first lighting sub-modules 14 are represented by hatched surfaces as opposed to the second lighting sub-modules 16. At the , the alternation is perfect in that each lighting sub-module directly adjacent to another lighting sub-module is of the other type. In other words, each lighting sub-module directly adjacent to one of the first lighting sub-modules 14 is one of the second lighting sub-modules 15 and vice versa.

According to lighting of the "code" type, only the first lighting sub-modules 14 are active, that is to say energized at the level of their light sources. They form first upper horizontal cut-off lighting sub-beams which, added together, form a first regulation lighting beam of the upper horizontal cut-off or "dip" type. Due to the alternating arrangement of the first and second lighting sub-modules 14 and 16, the overall output face of the lighting module 12 presents an illuminated appearance, at least at a minimum viewing distance, by d example of a meter, generally homogeneous.

As a function of "road" type lighting, the second lighting sub-modules 16 are active, that is to say under voltage at their light sources, advantageously in addition to the first lighting sub-modules 14. In this case, the overall exit face of the lighting module 12 is fully illuminated, thus providing an illuminated appearance close to or even identical to that of the "dipped" type lighting function. It should however be noted that it is also conceivable that in the "road" type lighting function, only the second lighting sub-modules 16 are active, in which case the illuminated aspect of the overall exit face of the light module 12 is almost identical to that of the "road" type light function.

The similarity of the illuminated aspects which has just been explained above is the result of the alternating juxtaposition of the first and second lighting sub-modules 14 and 16, combined with the thinness or reduced width of the first and second sub-modules lighting 14 and 16. Depending on the widths of the first and second lighting sub-modules 14 and 16, their number and the minimum viewing distance, the alternation may deviate from a strict alternation like that illustrated to the . It is indeed possible to group several of the first lighting sub-modules 14 while providing one or more of the second lighting sub-modules 16 between these groups, and vice versa.

The lighting module 12 may comprise a third lighting sub-module 17, producing a lighting sub-beam with an upper horizontal jump cutoff (commonly referred to by the English term "kink"), in addition to the first sub-beams. - lighting modules 14 producing the lighting sub-beams with upper right horizontal cut-off. This lighting sub-beam with an upper horizontal cut-off in jump can be little extended horizontally in comparison with the combination of lighting sub-beams with upper right horizontal cut-off. This third lighting sub-module 17 can be made in different ways, well known in themselves to those skilled in the art.

The illustrates in perspective one of the first and second lighting sub-modules 14 and 16. It essentially comprises a sheet optical guide 18 and at least one light source 20. The sheet optical guide 18 comprises an input face 18.1, a exit face 18.2 and a reflection face 18.3. The at least one light source 20 is arranged facing the input face 18.1. The reflection face 18.3 has a curved vertical profile, advantageously parabolic, dimensioned to reflect, advantageously by total reflection, the light propagating in the body of the flat optical guide, from the input face 18.1, towards the output face 18.2 , and this along an optical axis 18.4 of the lighting sub-module 14 or 16. In the case of one of the first lighting sub-modules 14, the vertical profile of the reflection face 18.3 is advantageously parabolic with a focus located at the rear edge of the at least one light source 20 so as to reflect all the light rays along the optical axis 18.4 or in a downward direction with respect to this axis.

Always at the , it can be observed that the output face 18.2 has a curved horizontal profile, for example circular or elliptical, and is connected to the body of the sheet optical guide by a connection portion 18.5 of the sheet optical guide having two side faces 18.5.1 and 18.5.2 divergent. This connecting portion 18.5 forms with the output face 18.2 a projection lens.

It should be noted that the principle of construction and operation of the first and second lighting sub-modules described above in relation to FIGS. 2 and 3 is known per se from the published patent document EP 2 045 515 A1.

The is a horizontal cross-sectional view of the front part of the sheet optical guide 18 of the . One can observe two ray tracings, in continuous line, coming from the at least one light source 20 facing the entrance face 18.1 ( ). These rays can spread out horizontally in the connecting portion 18.5 and be refracted when passing the interface formed by the exit face 18.2.

Additional light sources 22 can be arranged opposite at least one of the two side faces 18.5.1 and 18.5.2 of the connection portion 18.5. These additional light sources are in this case optical guides of circular section, supplied with light at one end and configured to distribute the light along said optical guide, the latter exiting transversely towards the side face(s) 18.5.1 and 18.5 .2. It is understood that other optical systems, in particular well known per se, can be envisaged. These additional light sources 22 make it possible to perform a third lighting function, namely a daytime lighting function or “DRL” (“Daytime Running Light”). One can observe four traces of rays, in broken lines, coming from the additional light sources 22. These rays are relatively spread out horizontally in the connection portion 18.5 and come out of the exit face 18.2 in a spread out manner, which is particularly suitable for this lighting function.

The is a profile view of the lighting module of the . One of the first lighting sub-modules 14 can be observed there, it being understood that this illustration also applies to the second lighting sub-modules 16. The output face 18.2 of the sheet optical guide 18 can present a vertical profile stepped so that the lighting module can have a rearward inclination from the bottom to the top of the overall exit face. As mentioned previously, the first lighting sub-modules 14 are configured to produce upper horizontal cut-off lighting sub-beams. The connecting sections 18.2.2 between the vertical sections 18.2.1 of the exit face 18.2 may have a downward inclination, from rear to front, so that the rays meeting them are deflected upwards. low. This means that these connecting sections 18.2.2 do not disturb the upper horizontal cut. The , being a side view, only shows the front end of the exit face 18.2; it is however understood that the vertical sections 18.2.1 have curved horizontal contours extending vertically and the connecting sections 18.2.2 have curved horizontal contours having an inclination which varies along said contour, this inclination being advantageously maximum at the front end as shown in .

The is a VI-VI sectional view of the lighting module 12 of the . Only three lighting sub-modules, namely two first lighting sub-modules 14 and a second lighting sub-module 16 are shown. It is observed that the first and second lighting sub-modules 14 and 16 are progressively shifted towards the rear from the interior to the exterior of the vehicle, that is to say from the left to the right at the , for a left headlight of the motor vehicle. This offset allows the lighting module 12 to present an overall exit face with an inclined profile, as mentioned above in relation to the , in particular in order to conform to the bodywork of the motor vehicle. Such an arrangement can limit the exit face on one side and increase it on the other side. Indeed, if we consider the second lighting sub-module 16 located between the first two lighting sub-modules 14, the left part (according to the orientation at the ) of the output face 18.2 is partially obscured by the output face 18.2 of the first lighting sub-module 14 located to its left and offset forwards. Similarly, the right part (according to the orientation at the ) of the output face 18.2 is free of obstacle for the light rays of the lighting sub-beam which leave it due to the rearward withdrawal of the output face 18.2 of the first lighting sub-module 14 located to his right. This situation is illustrated by the two ray traces in continuous line, the ray leaving the left part of the exit face 18.2 passing in front of the exit face 18.2 of the first lighting sub-module 14 on the left and representing the limitation towards the left of the exit face for the corresponding lighting sub-beam. The ray emerging from the right part of the exit face 18.2 shows that this right part is not or only slightly limited by the presence of the first lighting sub-module 14 to its right. In other words, the limitation of the active area of the exit face on one side is compensated by an increase on the opposite side when the first and second lighting sub-modules are shifted longitudinally.

Always at the it can be observed that the light emitted by the additional light sources 22, for the daytime lighting function, is transmitted in the connection portion 18.5 of the sheet optical guide 18 with more inclined angles with respect to the optical axis 18.4 and can thus exploit a larger area of the exit face 18.2 on the side where the first neighboring lighting sub-module is offset forwards. A ray trace, in broken lines, illustrates this phenomenon.

It may be advantageous to space the lighting sub-modules 14 and 16 transversely to limit the mutual occultations described above and/or to make the output faces 18.2 and the connection portions 18.5 asymmetrical with respect to the sheet of the guide optics so as to direct the light more towards the unobstructed side.

It is understood that what has just been described in relation to one of the second lighting sub-modules 16 also applies to the first lighting sub-modules 14 as soon as they are adjacent to second sub-modules lighting 16 offset longitudinally, similar to the .

The is a side view of a variant of the first and/or second lighting sub-modules 14 and 16. One, several or each of the first and/or second lighting sub-modules 14 and 16 can comprise two lighting modules 14.1 and 14.2 or 16.1 and 16.2 arranged oppositely with respect to a horizontal plane, as illustrated in . The sheet optical guides 181 and 182 of the two lighting sub-modules 14.1 and 14.2 or 16.1 and 16.2 have their input faces 181.1 and 182.1 facing each other. The respective light sources 20.1 and 20.2 are also opposed and advantageously arranged on the same plate. These light sources 20.1 and 20.2 are advantageously offset longitudinally, that is to say along the optical axis 18.4. This offset makes it possible to avoid overheating of the light sources and their surroundings. It makes it possible to take into account the fact that for the top lighting sub-module 14.1, it is advantageously the rear edge of the light source 20.1 which is located at the focus of the parabolic profile of the reflection face 181.3, whereas for the bottom lighting sub-module 14.2, it is advantageously the front edge of the light source 20.2 which is located at the focal point of the parabolic profile of the reflection face 182.3. The light source 20.2 could then be located behind the light source 20.1. The offset also makes it possible to compensate for the average longitudinal offset between the two sheet optical guides 181 and 182 due to the inclined profile, in this case towards the rear from bottom to top, of the total exit face of the first or second sub -lighting module 14 and 16. The output faces 181.2 and 182.2 are aligned longitudinally where they are adjacent, in this case at the level of the optical axis 18.4. Such a configuration makes it possible to increase the vertical extent of the first or second lighting sub-module 14 and 16 and to increase the lighting power thereof.

Figures 8 and 9 illustrate a lighting module of the projector 8 of the , according to a second embodiment of the invention. The reference numbers of the first embodiment are used to designate identical or corresponding elements, these numbers however being increased by 100. Reference is also made to the description of these elements within the framework of the first embodiment. Specific numbers between 100 and 200 are used to designate specific elements.

With reference to the and unlike the of the first embodiment, the first and second lighting sub-modules 114 and 116 are arranged horizontally and juxtaposed vertically. Similar to the first embodiment, the first lighting sub-modules 114 are each able to form a lighting sub-beam with upper horizontal cut-off and the second lighting sub-modules 116 are each able to form a sub- superior horizontal seamless illumination beam. The juxtaposition of the first and second lighting sub-modules 114 and 116 is alternated, similar to the first embodiment, so as to mix the first lighting sub-modules 114 with the second lighting sub-modules 116.

The is a top view of one of the first or second lighting sub-modules 114 and 116. It comprises a flat optical guide 118 with an input face 118.1 for the light emitted by the at least one light source 120, an exit face 118.2 and a reflection face 118.3. The exit face 118.2 comprises reliefs forming projection lenses 118.2.1 and the reflection face 118.3 comprises reflection facets 118.3.1 configured to return, by reflection, light towards the reliefs of the exit face 118.2 forming projection lenses 118.2.1. The reflection facets 118.3.1 are arranged in a staircase so as to reflect different portions of the light transmitted in the flat optical guide 118. In the present case, the input face 118.1 is generally parallel to the output 118.2 and reflection faces. 118.3, so that an intermediate reflection face 118.6 is provided between the input face 118.1 and the main part of the flat optical guide 118 delimited by the output 118.2 and reflection 118.3 faces. It is however possible to envisage providing an input face 118.1 transverse, or even perpendicular, to the main direction of the flat optical guide 118 delimited by the output faces 118.2 and reflection faces 118.3, in which case the intermediate reflection face 118.6 is not necessary.

Similar to the first embodiment, additional light sources 122 can be arranged at the rear of the flat optical guides 118, in this case opposite the reflection face 118.3, so as to be able to provide a third function of lighting, i.e. a daytime running light function.

The first and second lighting sub-modules 114 and 116 can be offset towards the rear, from bottom to top, so as to present an overall exit face with an inclined, or even curved, profile in a vertical plane in order to conform to the motor vehicle body.

As is visible at the , the reliefs of the exit face 118.2 forming the projection lenses 118.2.1 can be progressively shifted towards the rear, from the inside to the outside of the motor vehicle, in this case from the left to the right following the , so as to present an overall exit face with an inclined or even curved profile in a horizontal plane in order to conform to the bodywork of the motor vehicle.

The upper horizontal cutoff of the sub-beams of the first lighting sub-modules 114 can have a jump (commonly referred to by the English term “kink”), by adapting the reflection facets 118.3.1 and the corresponding projection lenses 118.2. 1. The presence of a third projection sub-module ensuring a break with jump, like the third lighting sub-module 17 ( ) of the first embodiment is not necessary. It can, however, be provided in a similar manner.

It should be noted that the principle of construction and operation of the first and second lighting sub-modules described above in relation to FIGS. 8 and 9 is known per se from the published patent document EP 2 679 884 A1.

Claims (11)

Lighting module (12; 112) for a motor vehicle (2), comprising a plurality of lighting sub-modules (14, 16; 112, 116) each comprising:
- at least one light source (20; 120);
- a flat optical guide (18; 118) with an input face (18.1; 118.1) facing the at least one light source (20; 120), an output face (18.2; 118.2) and, at the rear of the exit face (18.2; 118.2), a reflection face (18.3; 118.3) capable of reflecting light from the entrance face (18.1; 118.1) towards the exit face (18.2 ; 118.2);
characterized in that
the plurality of lighting sub-modules (14, 16; 114, 116) includes first lighting sub-modules (14; 114) configured to each produce a lighting sub-beam with an upper horizontal cutoff , and second lighting sub-modules (16; 116) configured to each produce a lighting sub-beam without an upper horizontal cut-off; and
the first and second lighting sub-modules (14, 16; 114, 116) are juxtaposed so as to form, along the juxtaposition, several alternations between the first and second lighting sub-modules (14, 16; 114, 116). A lighting module (12; 112) according to claim 1, wherein the flat optical guides (18; 118) of the plurality of lighting sub-modules (14, 16; 114, 116) extend in a direction principal horizontal or vertical, when the lighting module is in the mounting position and observed from the front. Lighting module (12; 112) according to one of Claims 1 and 2, in which the output faces (18.2; 118.2) of the flat optical guides (18; 118) of the plurality of lighting sub-modules ( 14, 16; 114, 116) are adjacent and form an overall output face of the lighting module having a height H and a width l, said height H being greater than or equal to 5 times said width l. Lighting module (12; 112) according to one of Claims 1 to 3, in which the several alternations between the first and second lighting sub-modules (14, 16; 114, 116) are at a number corresponding to the number of first lighting sub-modules (14; 114) or number of second lighting sub-modules (16; 116). Lighting module (12) according to one of Claims 1 to 4, in which the flat optical guides (18) of the plurality of lighting sub-modules (14, 16) form sheets extending in a direction main vertical, when the lighting module is in the mounting position and observed from the front, and are offset longitudinally relative to each other so that the output faces (18.2) of the said flat optical guides (18) have a inclined and/or curved horizontal profile, and preferably in which the exit face (18.2) of each of the flat optical guides (18) of the plurality of lighting sub-modules (14, 16) has a stepped vertical profile and inclined, up and down, backwards. Lighting module (12) according to claim 5, in which, for each of the flat optical guides (18) of the plurality of lighting sub-modules (14, 16), the entrance face (18.1) is transverse to the exit face (18.2) and the reflection face (18.3) has a curved vertical profile able to reflect the light from the entrance face (18.1) towards the exit face (18.2) along an optical axis (18.4) of the lighting sub-module (14, 16). Lighting module (12) according to one of Claims 5 and 6, in which each of the flat optical guides (18) of the plurality of lighting sub-modules (14, 16) comprises a connection portion (18.5) with two diverging side faces (18.5.1, 18.5.2), connecting the sheet to the outlet face (18.2), said outlet face (18.2) having a curved transverse profile forming a lens. Lighting module (12) according to claim 7, further comprising additional light sources (22) arranged at the rear of the two divergent faces (18.5.1, 18.5.2) of the flat optical guides (18) of the plurality of lighting sub-modules (14, 16), configured to provide a daytime lighting function. Lighting module (112) according to one of Claims 1 to 4, in which the flat optical guides (118) of the plurality of lighting sub-modules (114, 116) extend in a main horizontal direction, when the lighting module is in the mounting position and observed from the front, and are offset longitudinally relative to each other so that the output faces (118.2) of said flat optical guides (118) have an inclined vertical profile or curve. A lighting module (112) according to claim 9, wherein for each of the flat optical guides (118) of the plurality of lighting sub-modules (114, 116), the reflection face (118.3) comprises facets ( 118.3.1) capable of reflecting light from the input face (118.1) towards lenses (118.2.1) on the output face (118.2) along an optical axis (118.4) of the lighting sub-module (114 , 116), and preferably in which, for each of the flat optical guides (118) of the plurality of lighting sub-modules (114, 116), the reflection face (118.3) has a profile such that a distance between the output face (118.2) and the reflection face (118.3), along the optical axis (118.4) of the lighting sub-module (114, 116), decreases as a distance between said face reflection (118.3) and the entrance face (118.1) increases. Lighting module (112) according to claim 10, further comprising additional light sources (22) arranged behind the reflection faces (118.3) of the flat optical guides (118) of the plurality of sub-modules lighting (114, 116), configured to provide a daytime lighting function.